Energy distributions of blazars

Details Energy distributions of blazars Energy distributions of blazars

Feb 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988aj.....95..307i&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 95, Feb. 1988, p. 307-351.

Astronomy and Astrophysics

Astronomy

227

Astronomical Spectroscopy, Bl Lacertae Objects, Blazars, Emission Spectra, Infrared Spectra, Line Spectra, Spectral Energy Distribution, Far Infrared Radiation, Infrared Astronomy Satellite, Radiant Flux Density, Synchrotron Radiation, X Ray Spectra

Scientific paper

This paper presents observations of 162 blazars, over one-half of which were detected with data from the IRAS satellite using a coadded survey and pointed observations. The far-IR data were combined with published data at other wavelengths to complete 93 energy distributions from 10 to the 8th to 10 to the 18th Hz. The IRAS data were used to search for variability on time scales of 3-9 months in 24 objects. The detection rate of variability found for blazars was nearly 40 percent, as compared with a complete absence of detected variability in data sets for quasars and Seyfert galaxies. The range of variability in both spectral index and flux density increases with decreasing wavelength. Half of the blazars with total luminosities less than 10 to the 12th solar luminosity show evidence for thermal IR component. The global energy budget of blazars is dominated by IR emission from 1 to 100 microns.

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